Belief in God is rational.
Everything has a cause. So unless there is a first cause, then you would have an infinite regress. And then nothing could exist. Therefore there must be a first cause. Therefore God, the first cause, exists. QED. (You could prove the first step a priori that everything has a cause by noting that nothing can come from nothing. This makes it a priori, not just an empirical observation).

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8.12.16

Hyper religiosity

Hyper religiosity actually has a history that is very different from simple keeping of Torah. That is people first think they will adhere to the literal meaning of the text (of the Oral and Written Law). Thus being more loyal to the Torah than normal Jews. Then comes the personal delusions in the form of visions that radically change the meaning of the texts. That is.-- first (step one) being supposedly more loyal and faithful to Torah, and then (step two) ending up replacing the Torah with their personal revelation (schizophrenic delusions.)They hide their secret venom for the holy Torah and Jews that are not part of their cult.[I should, make it clear that straight Torah is great. It is when the hyper-religiosity comes from schizoid tendencies that there is a problem. There is also a problem when a normal person is seduced to join a cult and by that partakes of the schizoid delusions of the cult even though he is himself sane--at first. For this reason the Gra signed the excommunication because he did not want normal Jews joining any schizoid cult and thus slowly losing their own sanity.
The Gra said that to the degree one lacks knowledge of the seven wisdoms he will lack in knowledge of the Torah. That refers to the Trivium and Quadrivium: Grammar, Logic, Rhetoric,
Music, Astronomy, Arithmetic, Geometry. [The Hebrew translation of these in the חובות לבבות is not like modern Hebrew. הנדסה today is used to refer to Architecture. In the Obligations of the Heart it refers to Geometry.]
To subvert Torah many people pretend to be religious and replace Torah with religious delusions.
They distract people from real Torah. Anything as long as it is not Gemara, Rashi, and Tosphot or the worthwhile seven wisdoms.
I do not agree with redefining Torah to make it correspond to people's supposedly mystic delusion.
The trouble with the religious and their schools is they are on the forefront of every new kind of delusion. They try to hide it, but that is a fact.

God would never ratify the message of a false prophet. That so
many religious leaders and teachers fell under the spell of Nathan from Gaza attests
to the fact he was not a peripheral figure in the mystic circles, but his influence with regards to the movement’s adoption and approach to
the kabalah of the Ari was decisive. This taken by itself
represents should represent a devastating blow to the propagandists of a new
movement, but when coupled with the other little known facts about the
origins of these mystic circles should lead any and all Jewish people desirous of being
led to the truth that this movement was nothing but a successful deviation of
historical Torah. I do not want to go into it in detail. But it is simple to draw the line between the dots.

As time went on, these factors were to produce the
inevitable march from spiritual pride and pseudo-religiosity to down right
diabolical deception and delusion.